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Check the authenticity of air compressor oil

4 in 1 combind compressor screw compressor with dryer

There are counterfeit and inferior products in almost all walks of life. The difference is in the severity of the consequences. For air compressors, the hazards of using fake and shoddy air compressor oil often lead to various unexpected failures of the air compressor. For major customers, it is unrealistic to purchase related equipment for oil quality inspection. The following are some simple inspection methods for air compressor oil quality:

1. Lubrication performance: The lubrication performance of air compressor oil is related to the viscosity of air compressor oil. Generally speaking, there is no viscosity or a decrease in viscosity, which means that the lubricating performance of the air compressor oil is deteriorated. After the lubricating performance of the air compressor oil decreases, the adhesion or adhesion will also deteriorate accordingly, and it will not be able to form an oil film with sufficient strength to perform a good lubricating effect.

Check air compressor oil performance: Rub thumb and forefinger with air compressor oil, if it feels sticky. It can be concluded that the air compressor oil has good lubricating properties. If it feels astringent, it can be concluded that the air compressor oil has lost its proper lubricating properties.

2. Moisture: Put the air compressor oil into the test tube and observe its transparency. If it is not clear and transparent, but turbid, it can be preliminarily determined that the air compressor oil contains water.

There are two reliable ways to determine if oil contains water:

①Put anhydrous sodium sulfate (white powder) into a test tube equipped with air compressor oil. For example, copper sulfate turns from white to blue, proving that there is water in the oil. This method cannot tell how much water there is, it can only be estimated based on the amount of bubbles and copper sulfate in the air compressor oil during the heating process.

② Pour the oil to be tested into the test tube, the amount of oil is two-thirds of the volume of the test tube. After sealing the mouth of the test tube with a cork and wax, heat it on an alcohol burner. If there are bubbles and crackling sounds at the same time, and water droplets condense on the wall of the test tube above the oil surface, it means that there is water in the oil.

3. Viscosity: Install air compressor oil that meets quality standards in the test tube, and seal it with cork and wax. Do not overfill. Leave about 5mm high. Install the air compressor oil to be checked in another test tube. The size and oil volume of the test tube used should be the same as the previous test tube, and sealed with cork and wax. Observe the bubbles and test the viscosity: Invert the two test tubes and observe the rising speed of the bubbles. If air bubbles rise faster than in standard air compressor oil, it indicates that the oil is less viscous. Instead, the viscosity is high.

4. Impurities: Put the air compressor oil into the test tube and observe whether there are suspended particulate impurities.

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